Arch Support

Currently, the Rust compiler (rustc) uses LLVM for code generation, which limits the supported architectures that can be targeted. In addition, support for building the kernel with LLVM/Clang varies (see Building Linux with Clang/LLVM). This support is needed for bindgen which uses libclang.

Below is a general summary of architectures that currently work. Level of support corresponds to S values in the MAINTAINERS file.

Architecture	Level of support	Constraints
arm	Maintained	armv6 and compatible only, RUST_OPT_LEVEL >= 2
arm64	Maintained	None
powerpc	Maintained	ppc64le only, RUST_OPT_LEVEL < 2 requires CONFIG_THREAD_SHIFT=15
riscv	Maintained	riscv64 only
x86	Maintained	x86_64 only